TSV and CSV are both tabular text formats. TSV uses tabs as delimiters; CSV uses commas. This tool replaces tabs with commas and adds double-quote wrapping around any fields that contain commas or newlines — producing valid RFC 4180 CSV. Runs entirely in your browser.
Convert tab-separated values to comma-separated — handles quoted fields. No account needed — all processing happens locally in your browser and your input is never transmitted.
Empty cells, trailing empty columns, and Unicode characters are all preserved. Pick CRLF line endings if the file is destined for Excel on Windows, or LF for everything else. The whole conversion runs as a single pass over the input string — fast even on multi-megabyte tables.
They are wrapped in double quotes, and any internal double quote is escaped by doubling it ("" — the RFC 4180 rule). Fields without commas, quotes, or newlines are left unquoted.
Use CRLF (\r\n) for maximum compatibility with Excel on Windows; LF (\n) is fine for tools on macOS, Linux, and most modern data pipelines. Excel on macOS reads both.
Empty TSV cells become empty CSV fields (a comma immediately followed by another comma). Trailing empty columns are kept so column counts stay consistent.
No. The conversion is pure JavaScript text manipulation that runs in your browser. Your TSV is never uploaded.
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